A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m. What is the horizontal velocity of the ball just before it touches the ground?
A) 35 m/s
B) 9.8 m/s
C) 20 m/s
D) 4.9 m/s
E) 70 m/s

Question

Quizplus · Accepted Answer

Explanation:Using the equation of motion, v^2 = u^2 + 2as, we have:v^2 = 0 + 2 * 9.8 * 1.6v^2 = 31.36v = 5.6 m/sThe horizontal velocity of the ball just before it touches the ground is equal to its initial horizontal velocity, which is 5.6 m/s.

A Ball Rolls Over the Edge of a Table with a Horizontal